Pith Number

pith:CTNNK6FU

pith:2009:CTNNK6FUAPSZRIAPBJ3H2667WO

not attested not anchored not stored refs pending

Addendum to `Fake Projective Planes'

Gopal Prasad, Sai-Kee Yeung

arxiv:0906.4932 v3 · 2009-06-25 · math.AG · math.NT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CTNNK6FUAPSZRIAPBJ3H2667WO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:13:12.427229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

14dad578b403e598a00f0a767d7bdfb3987e9ea68e6cbbd0632d74883638c670

Aliases

arxiv: 0906.4932 · arxiv_version: 0906.4932v3 · doi: 10.48550/arxiv.0906.4932 · pith_short_12: CTNNK6FUAPSZ · pith_short_16: CTNNK6FUAPSZRIAP · pith_short_8: CTNNK6FU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CTNNK6FUAPSZRIAPBJ3H2667WO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 14dad578b403e598a00f0a767d7bdfb3987e9ea68e6cbbd0632d74883638c670

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "809b1ca753495353d6fc665b102881b283651d1ff7999738ad3c4fe122df6510",
    "cross_cats_sorted": [
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-06-25T09:34:28Z",
    "title_canon_sha256": "0f6d36338c578af6a2c77c2364be64b950420708682ddd6b89dc71c2e2eb5bc9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4932",
    "kind": "arxiv",
    "version": 3
  }
}